In the Drawing tab of the Options dialog, what is the difference between the Schematic and Scaled settings for Drawing Mode?
The Drawing Mode setting is used to determine the default settings for length calculation for links in the model.
If the Drawing Mode is set to Scaled, the pipe lengths are determined based on the length of the line in the drawing based on the scale entered. For instance, if the scale is set to 1 in = 40 feet, then a pipe that is two inches long in the drawing pane would have a scaled length of 80 feet.
If the Drawing Mode is set Schematic, the pipes lengths are not initialized by the length in the drawing pane. You will need to manually enter the pipe lengths in the pipe properties or FlexTables.
When using the Scaled drawing mode, the pipe property "Has User Defined Length?" will be set to False. When using Schematic as the drawing "Has User Defined Length?" is set to True. You can adjust this field globally or on a pipe-by-pipe basis. So if you want most of the pipes in the model to be scaled but a few will have a user-defined length, you can use the pipe properties or FlexTable to change this setting and enter a length of your choosing.
Accounting for elevation differences in scaled pipe lengths